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Is there any way I can define a variable in LaTeX?
(5 answers)
Closed 5 years ago.
Is there a way to add a text by reference using LaTeX? I have several text references to 'versionXX.yy'. I wonder if I can define this in one place so I don't need to update it in all places.
Thanks
You could define a variable or new command with your version at the beginning and then just use this definition. See here
Btw. there is a special site called tex.stackexchange.com for this kind of questions.
Related
This question already has answers here:
Add an element to an array in Swift
(15 answers)
Closed 5 years ago.
everybody! I've just started learning swift so sorry if the question is dumb. I want to add values to an array "uu" using a loop. However every time it just overwrites "uu".
Pls help, thanks!
My code
That is simple as
uu.append(newNumber)
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how to create tcl proc with hyphen flag arguments
(4 answers)
Closed 7 years ago.
I have a script that will require many short and long options and was wondering what would be the most efficient way to parse the command line arguments. Using for-each and if-else would make the code too long and difficult to modify, so is there be any standard function that can help me (something like getopt for C)?
We discussed this four days ago and a few suggestions were posted.
There is also the cmdline package in Tcllib.
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What is <<- in ruby?
(2 answers)
Closed 7 years ago.
This bit of code is taken from Ryan Bates' Railscast episode 343 on full-text search in PostgreSQL. I would like to understand it, but I can't find anything on the <<- operator (if it even is an operator). Can someone please point me to somewhere I can learn about this?
rank = <<-RANK
ts_rank(to_tsvector(name), plainto_tsquery(#{sanitize(query)})) +
ts_rank(to_tsvector(content), plainto_tsquery(#{sanitize(query)}))
RANK
It is a multiline String in ruby, the contents are interpolated and then executed in PostgreSQL. This is a standard way to run scripts on the command line. I use it to write AWS Scripts from within Capistrano.
It uses the here-doc syntax.
http://blog.jayfields.com/2006/12/ruby-multiline-strings-here-doc-or.html
http://ruby-doc.org/core-2.2.0/doc/syntax/literals_rdoc.html#label-Here+Documents
It's official name is a heredoc and there are two different ways you can use them.
One is how you have it laid out where the start will be <<-NAME and the end will simple be NAME.
The other way you can do it is <<NAME but when closing you have to make sure there are no spaces before NAME on the line. Some example code below to show the difference.
def sample_method
heredoc1 = <<-NAME
This is a sample heredoc
NAME
heredoc2 = <<OTHERHEREDOC
Both of these are the same thing
OTHERHEREDOC
end
Both of these will work as heredocs, but as you can see the second one looks a little uglier. Choose whichever you prefer when using them yourself, but make sure to pay attention to white space and the end of string delimiter if you don't include the dash.
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What is the standard (or best supported) big number (arbitrary precision) library for Lua?
(6 answers)
Closed 8 years ago.
As an example, I want to convert:
1j16qd5g0lc
To:
5589146303201280
But currently ‘tonumber’ converts it to:
5.5891463032013e+15
I understand that there is a bit.tonumber function that might work better but that function is not available to me. Could someone implement what I need easily? I am not too familiar Lua.
Thank you! :)
Try print(string.format("%.0f",tonumber("1j16qd5g0lc",36))).
This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
What does map(&:name) mean in Ruby?
Assume that Game is an active record model, what does the & mean in the following code?
Games.group_by(&:genre)
See this: What do you call the &: operator in Ruby?